Chapter 6 Test

If a system of equations has no solution, what does the graph look like? 

• intersecting lines
• parallel lines
• skew lines
• intersecting lines

If a system of linear equations has one solution, what does this mean about the two lines? 

• Parallel lines
• the same line 
• Intersecting lines

If a system of linear equations has infinitely many solutions, what does this mean about the two lines? 

• Intersecting lines
• Identical line
• Parallel lines

Solve the following system of equations by graphing:

Solve the following system by graphing.  What is the solution?

Solve by graphing:
y=5x+3

y=-2x-4

Solve the system by graphing:
y = 6x - 4
2x + 2y = 6

Solve by graphing.
y = 2x + 1
y = 4x - 1

Solve the system of equations by substitution:

y = 4x+1

3x + 2y = 13

• (1, 5)

• (5, 1)

• (0.25, 2)

• ∅

Solve the system of equations by substitution.
y = -4x + 5
y =  3x - 16

• (-3, -25)
• (3,-7)
• (11, 17)
• (21, 47)